18K Gold Calculator
18K gold (.750 fine) contains 75.0% pure gold. Enter the gross weight of your 18K item and the calculator returns the current gold spot value of the pure-gold content.
- 1 g$0.0000
- 10 g$0.0000
- 1 ozt$0.0000
- 1 dwt$0.0000
- 1 kg$0.0000
About the 18k gold calculator
18K gold (.750 fine) contains 75.0% pure gold. Enter the gross weight of your 18K item and the calculator returns the current gold spot value of the pure-gold content.
How it works
- 1Spot price loads live and is editable.
- 2Enter the weight of your 18K gold in any common unit.
- 3Sidebar shows the value, pure metal content and unit conversions.
- 4Quick reference table covers common weights at the current spot.
Frequently asked questions
FAQWhat is 18K gold?
18K gold is 75.00% pure gold mixed with alloy metals (copper, silver, palladium or nickel) for durability. The remaining 25.00% is alloy.
How is the melt value of 18K gold calculated?
Weight × purity (75.00%) × gold spot price per gram. This calculator handles the conversion between grams, troy ounces, pennyweight and other units automatically.
What is the difference between 18K and other karats?
Karat measures purity in 24ths. 18K = 18/24 = 75.00% pure. Higher karats are softer; lower karats are more durable but have less intrinsic gold value per gram.
Do scrap buyers pay full melt for 18K gold?
Typically 70%–90% of melt — refiners and dealers take a margin to cover refining cost and risk. Use this calculator as your reference value, then negotiate.